This is the Z axis tape people were talking about
Both Apple and Sharp have used it (or something similar) in their products.3M Z-Axis Conductive Tape 9703 - 2"x6" (50mm x 150mm) Strip
When Bunnie showed up at Adafruit with the prototype for his Chibitronics Circuit Stickers we were all like "How on earth does that work?" and he was all like "Z-Axis tape - ...www.adafruit.com
No I haven't tried it for an LCD repair.
This looks incredibly promising, because it is able to double side, glue multiple points and not create cross connection between near points. Can be cut to required strip size. I think you've found the solution product longman! Going to order and try it on next PC-55 display that needs it.